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- Committer: Teddy Hogeborn
- Date: 2014-02-16 13:12:20 UTC
- Revision ID: teddy@recompile.se-20140216131220-4nv9kjolkrxvn6l3
Tags: version-1.6.4-1
* Makefile (version): Changed to "1.6.4".
* NEWS (Version 1.6.4): New entry.
* debian/changelog (1.6.4-1): - '' -
* NEWS (Version 1.6.4): New entry.
* debian/changelog (1.6.4-1): - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
80
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
97
104
static plugin *plugin_list = NULL;
98
105
99
/* Gets a existing plugin based on name,
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
106
113
return p;
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
118
133
return NULL;
119
134
}
120
135
}
121
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
126
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
136
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
141
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
129
147
free(copy_name);
130
148
free(new_plugin);
149
errno = e;
131
150
return NULL;
132
151
}
133
152
new_plugin->argv[0] = copy_name;
134
153
new_plugin->argv[1] = NULL;
135
154
136
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
158
if(new_plugin->environ == NULL){
159
int e = errno;
138
160
free(copy_name);
139
161
free(new_plugin->argv);
140
162
free(new_plugin);
163
errno = e;
141
164
return NULL;
142
165
}
143
166
new_plugin->environ[0] = NULL;
148
171
}
149
172
150
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
151
175
static bool add_to_char_array(const char *new, char ***array,
152
176
int *len){
153
177
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
156
182
/* Malloc check */
157
183
if(*array == NULL){
158
184
return false;
159
185
}
160
186
/* Make a copy of the new string */
161
char *copy = strdup(new);
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
162
191
if(copy == NULL){
163
192
return false;
164
193
}
171
200
}
172
201
173
202
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
174
204
static bool add_argument(plugin *p, const char *arg){
175
205
if(p == NULL){
176
206
return false;
179
209
}
180
210
181
211
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
182
213
static bool add_environment(plugin *p, const char *def, bool replace){
183
214
if(p == NULL){
184
215
return false;
187
218
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
219
/* Search for this environment variable */
189
220
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
221
if(strncmp(*e, def, namelen + 1) == 0){
191
222
/* It already exists */
192
223
if(replace){
193
char *new = realloc(*e, strlen(def));
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
194
228
if(new == NULL){
195
229
return false;
196
230
}
206
240
/*
207
241
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
242
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
244
*/
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
247
/* If reading the flags failed, return error indication now. */
215
248
if(ret < 0){
216
249
return ret;
217
250
}
218
251
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
220
254
}
221
255
222
256
223
257
/* Mark processes as completed when they exit, and save their exit
224
258
status. */
225
void handle_sigchld(__attribute__((unused)) int sig){
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
226
261
while(true){
227
262
plugin *proc = plugin_list;
228
263
int status;
232
267
break;
233
268
}
234
269
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
237
273
}
238
/* No child processes */
239
break;
274
error(0, errno, "waitpid");
240
275
}
241
276
242
277
/* A child exited, find it in process_list */
243
278
while(proc != NULL and proc->pid != pid){
244
279
proc = proc->next;
248
283
continue;
249
284
}
250
285
proc->status = status;
251
proc->completed = true;
286
proc->completed = 1;
252
287
}
288
errno = old_errno;
253
289
}
254
290
255
291
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
257
294
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
261
295
for(size_t written = 0; written < length; written += (size_t)ret){
262
296
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
263
297
length - written));
269
303
}
270
304
271
305
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
272
307
static void free_plugin(plugin *plugin_node){
273
308
274
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
280
315
}
281
316
free(plugin_node->environ);
282
317
free(plugin_node->buffer);
283
318
284
319
/* Removes the plugin from the singly-linked list */
285
320
if(plugin_node == plugin_list){
286
321
/* First one - simple */
314
349
struct stat st;
315
350
fd_set rfds_all;
316
351
int ret, maxfd = 0;
352
ssize_t sret;
317
353
uid_t uid = 65534;
318
354
gid_t gid = 65534;
319
355
bool debug = false;
328
364
sigemptyset(&sigchld_action.sa_mask);
329
365
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
330
366
if(ret == -1){
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
333
369
goto fallback;
334
370
}
335
371
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
336
372
if(ret == -1){
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
339
375
goto fallback;
340
376
}
341
377
344
380
{ .name = "global-options", .key = 'g',
345
381
.arg = "OPTION[,OPTION[,...]]",
346
382
.doc = "Options passed to all plugins" },
347
{ .name = "global-env", .key = 'e',
383
{ .name = "global-env", .key = 'G',
348
384
.arg = "VAR=value",
349
385
.doc = "Environment variable passed to all plugins" },
350
386
{ .name = "options-for", .key = 'o',
351
387
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
352
388
.doc = "Options passed only to specified plugin" },
353
{ .name = "env-for", .key = 'f',
389
{ .name = "env-for", .key = 'E',
354
390
.arg = "PLUGIN:ENV=value",
355
391
.doc = "Environment variable passed to specified plugin" },
356
392
{ .name = "disable", .key = 'd',
357
393
.arg = "PLUGIN",
358
394
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
396
.arg = "PLUGIN",
397
.doc = "Enable a specific plugin", .group = 1 },
359
398
{ .name = "plugin-dir", .key = 128,
360
399
.arg = "DIRECTORY",
361
400
.doc = "Specify a different plugin directory", .group = 2 },
370
409
.doc = "Group ID the plugins will run as", .group = 3 },
371
410
{ .name = "debug", .key = 132,
372
411
.doc = "Debug mode", .group = 4 },
412
/*
413
* These reproduce what we would get without ARGP_NO_HELP
414
*/
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.doc = "Print program version", .group = -1 },
373
421
{ .name = NULL }
374
422
};
375
423
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
378
switch (key) {
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
427
switch(key){
428
char *tmp;
429
intmax_t tmp_id;
379
430
case 'g': /* --global-options */
380
if (arg != NULL){
381
char *p;
382
while((p = strsep(&arg, ",")) != NULL){
383
if(p[0] == '\0'){
384
continue;
385
}
386
if(not add_argument(getplugin(NULL), p)){
387
perror("add_argument");
388
return ARGP_ERR_UNKNOWN;
389
}
390
}
391
}
392
break;
393
case 'e': /* --global-env */
394
if(arg == NULL){
395
break;
396
}
397
431
{
398
char *envdef = strdup(arg);
399
if(envdef == NULL){
400
break;
401
}
402
if(not add_environment(getplugin(NULL), envdef, true)){
403
perror("add_environment");
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
436
}
404
437
}
405
438
}
406
439
break;
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
442
break;
407
443
case 'o': /* --options-for */
408
if (arg != NULL){
409
char *p_name = strsep(&arg, ":");
410
if(p_name[0] == '\0'){
411
break;
412
}
413
char *opt = strsep(&arg, ":");
414
if(opt[0] == '\0'){
415
break;
416
}
417
if(opt != NULL){
418
char *p;
419
while((p = strsep(&opt, ",")) != NULL){
420
if(p[0] == '\0'){
421
continue;
422
}
423
if(not add_argument(getplugin(p_name), p)){
424
perror("add_argument");
425
return ARGP_ERR_UNKNOWN;
426
}
444
{
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
448
errno = EINVAL;
449
break;
450
}
451
*option_list = '\0';
452
option_list++;
453
if(arg[0] == '\0'){
454
argp_error(state, "Empty plugin name");
455
errno = EINVAL;
456
break;
457
}
458
char *option;
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
461
break;
427
462
}
428
463
}
429
464
}
430
465
break;
431
case 'f': /* --env-for */
432
if(arg == NULL){
433
break;
434
}
466
case 'E': /* --env-for */
435
467
{
436
468
char *envdef = strchr(arg, ':');
437
469
if(envdef == NULL){
438
break;
439
}
440
char *p_name = strndup(arg, (size_t) (envdef-arg));
441
if(p_name == NULL){
442
break;
443
}
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
444
475
envdef++;
445
if(not add_environment(getplugin(p_name), envdef, true)){
446
perror("add_environment");
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
447
480
}
481
add_environment(getplugin(arg), envdef, true);
448
482
}
449
483
break;
450
484
case 'd': /* --disable */
451
if (arg != NULL){
452
plugin *p = getplugin(arg);
453
if(p == NULL){
454
return ARGP_ERR_UNKNOWN;
455
}
456
p->disabled = true;
485
{
486
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
489
}
490
}
491
break;
492
case 'e': /* --enable */
493
{
494
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
497
}
457
498
}
458
499
break;
459
500
case 128: /* --plugin-dir */
501
free(plugindir);
460
502
plugindir = strdup(arg);
461
if(plugindir == NULL){
462
perror("strdup");
463
}
464
503
break;
465
504
case 129: /* --config-file */
466
505
/* This is already done by parse_opt_config_file() */
467
506
break;
468
507
case 130: /* --userid */
469
uid = (uid_t)strtol(arg, NULL, 10);
508
tmp_id = strtoimax(arg, &tmp, 10);
509
if(errno != 0 or tmp == arg or *tmp != '\0'
510
or tmp_id != (uid_t)tmp_id){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
514
}
515
uid = (uid_t)tmp_id;
470
516
break;
471
517
case 131: /* --groupid */
472
gid = (gid_t)strtol(arg, NULL, 10);
518
tmp_id = strtoimax(arg, &tmp, 10);
519
if(errno != 0 or tmp == arg or *tmp != '\0'
520
or tmp_id != (gid_t)tmp_id){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
524
}
525
gid = (gid_t)tmp_id;
473
526
break;
474
527
case 132: /* --debug */
475
528
debug = true;
476
529
break;
530
/*
531
* These reproduce what we would get without ARGP_NO_HELP
532
*/
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
542
exit(EXIT_SUCCESS);
543
break;
544
/*
545
* When adding more options before this line, remember to also add a
546
* "case" to the "parse_opt_config_file" function below.
547
*/
477
548
case ARGP_KEY_ARG:
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
479
break;
480
case ARGP_KEY_END:
481
break;
549
/* Cryptsetup always passes an argument, which is an empty
550
string if "none" was specified in /etc/crypttab. So if
551
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
554
}
482
555
default:
483
556
return ARGP_ERR_UNKNOWN;
484
557
}
485
return 0;
558
return errno; /* Set to 0 at start */
486
559
}
487
560
488
561
/* This option parser is the same as parse_opt() above, except it
489
562
ignores everything but the --config-file option. */
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
493
switch (key) {
563
error_t parse_opt_config_file(int key, char *arg,
564
__attribute__((unused))
565
struct argp_state *state){
566
errno = 0;
567
switch(key){
494
568
case 'g': /* --global-options */
495
case 'e': /* --global-env */
569
case 'G': /* --global-env */
496
570
case 'o': /* --options-for */
497
case 'f': /* --env-for */
571
case 'E': /* --env-for */
498
572
case 'd': /* --disable */
573
case 'e': /* --enable */
499
574
case 128: /* --plugin-dir */
500
575
break;
501
576
case 129: /* --config-file */
577
free(argfile);
502
578
argfile = strdup(arg);
503
if(argfile == NULL){
504
perror("strdup");
505
}
506
break;
579
break;
507
580
case 130: /* --userid */
508
581
case 131: /* --groupid */
509
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
510
586
case ARGP_KEY_ARG:
511
case ARGP_KEY_END:
512
587
break;
513
588
default:
514
589
return ARGP_ERR_UNKNOWN;
515
590
}
516
return 0;
591
return errno;
517
592
}
518
593
519
594
struct argp argp = { .options = options,
521
596
.args_doc = "",
522
597
.doc = "Mandos plugin runner -- Run plugins" };
523
598
524
/* Parse using the parse_opt_config_file in order to get the custom
599
/* Parse using parse_opt_config_file() in order to get the custom
525
600
config file location, if any. */
526
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
527
if (ret == ARGP_ERR_UNKNOWN){
528
fprintf(stderr, "Unknown error while parsing arguments\n");
529
exitstatus = EXIT_FAILURE;
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
603
NULL, NULL);
604
switch(ret){
605
case 0:
606
break;
607
case ENOMEM:
608
default:
609
errno = ret;
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
612
goto fallback;
613
case EINVAL:
614
exitstatus = EX_USAGE;
530
615
goto fallback;
531
616
}
532
617
534
619
argp.parser = parse_opt;
535
620
536
621
/* Open the configfile if available */
537
if (argfile == NULL){
622
if(argfile == NULL){
538
623
conffp = fopen(AFILE, "r");
539
624
} else {
540
625
conffp = fopen(argfile, "r");
541
}
626
}
542
627
if(conffp != NULL){
543
628
char *org_line = NULL;
544
629
char *p, *arg, *new_arg, *line;
545
630
size_t size = 0;
546
ssize_t sret;
547
631
const char whitespace_delims[] = " \r\t\f\v\n";
548
632
const char comment_delim[] = "#";
549
633
550
634
custom_argc = 1;
551
635
custom_argv = malloc(sizeof(char*) * 2);
552
636
if(custom_argv == NULL){
553
perror("malloc");
554
exitstatus = EXIT_FAILURE;
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
555
639
goto fallback;
556
640
}
557
641
custom_argv[0] = argv[0];
558
642
custom_argv[1] = NULL;
559
643
560
644
/* for each line in the config file, strip whitespace and ignore
561
645
commented text */
562
646
while(true){
564
648
if(sret == -1){
565
649
break;
566
650
}
567
651
568
652
line = org_line;
569
653
arg = strsep(&line, comment_delim);
570
654
while((p = strsep(&arg, whitespace_delims)) != NULL){
573
657
}
574
658
new_arg = strdup(p);
575
659
if(new_arg == NULL){
576
perror("strdup");
577
exitstatus = EXIT_FAILURE;
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
578
662
free(org_line);
579
663
goto fallback;
580
664
}
583
667
custom_argv = realloc(custom_argv, sizeof(char *)
584
668
* ((unsigned int) custom_argc + 1));
585
669
if(custom_argv == NULL){
586
perror("realloc");
587
exitstatus = EXIT_FAILURE;
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
588
672
free(org_line);
589
673
goto fallback;
590
674
}
591
675
custom_argv[custom_argc-1] = new_arg;
592
custom_argv[custom_argc] = NULL;
676
custom_argv[custom_argc] = NULL;
593
677
}
594
678
}
679
do {
680
ret = fclose(conffp);
681
} while(ret == EOF and errno == EINTR);
682
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
685
goto fallback;
686
}
595
687
free(org_line);
596
688
} else {
597
689
/* Check for harmful errors and go to fallback. Other errors might
598
690
not affect opening plugins */
599
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
600
perror("fopen");
601
exitstatus = EXIT_FAILURE;
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
602
694
goto fallback;
603
695
}
604
696
}
605
/* If there was any arguments from configuration file,
606
pass them to parser as command arguments */
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
607
699
if(custom_argv != NULL){
608
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
609
0, NULL);
610
if (ret == ARGP_ERR_UNKNOWN){
611
fprintf(stderr, "Unknown error while parsing arguments\n");
612
exitstatus = EXIT_FAILURE;
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
702
NULL, NULL);
703
switch(ret){
704
case 0:
705
break;
706
case ENOMEM:
707
default:
708
errno = ret;
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
711
goto fallback;
712
case EINVAL:
713
exitstatus = EX_CONFIG;
613
714
goto fallback;
614
715
}
615
716
}
616
717
617
718
/* Parse actual command line arguments, to let them override the
618
719
config file */
619
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
620
if (ret == ARGP_ERR_UNKNOWN){
621
fprintf(stderr, "Unknown error while parsing arguments\n");
622
exitstatus = EXIT_FAILURE;
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
722
NULL, NULL);
723
switch(ret){
724
case 0:
725
break;
726
case ENOMEM:
727
default:
728
errno = ret;
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
731
goto fallback;
732
case EINVAL:
733
exitstatus = EX_USAGE;
623
734
goto fallback;
624
735
}
625
736
630
741
for(char **a = p->argv; *a != NULL; a++){
631
742
fprintf(stderr, "\tArg: %s\n", *a);
632
743
}
633
fprintf(stderr, "...and %u environment variables\n", p->envc);
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
634
745
for(char **a = p->environ; *a != NULL; a++){
635
746
fprintf(stderr, "\t%s\n", *a);
636
747
}
637
748
}
638
749
}
639
750
640
/* Strip permissions down to nobody */
751
if(getuid() == 0){
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
757
} else {
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
if(ret == -1){
760
error(0, errno, "fstat");
761
} else {
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
764
if(ret == -1){
765
error(0, errno, "fchown");
766
}
767
}
768
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
770
}
771
}
772
773
/* Lower permissions */
774
ret = setgid(gid);
775
if(ret == -1){
776
error(0, errno, "setgid");
777
}
641
778
ret = setuid(uid);
642
if (ret == -1){
643
perror("setuid");
644
}
645
setgid(gid);
646
if (ret == -1){
647
perror("setgid");
648
}
649
650
if (plugindir == NULL){
651
dir = opendir(PDIR);
652
} else {
653
dir = opendir(plugindir);
654
}
655
656
if(dir == NULL){
657
perror("Could not open plugin dir");
658
exitstatus = EXIT_FAILURE;
659
goto fallback;
660
}
661
662
/* Set the FD_CLOEXEC flag on the directory, if possible */
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
663
784
{
664
int dir_fd = dirfd(dir);
665
if(dir_fd >= 0){
666
ret = set_cloexec_flag(dir_fd);
667
if(ret < 0){
668
perror("set_cloexec_flag");
669
exitstatus = EXIT_FAILURE;
670
goto fallback;
671
}
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
803
if(dir_fd == -1){
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
806
goto fallback;
807
}
808
809
#ifndef O_CLOEXEC
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
812
if(ret < 0){
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
816
goto fallback;
817
}
818
#endif /* O_CLOEXEC */
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
672
826
}
673
827
}
674
828
676
830
677
831
/* Read and execute any executable in the plugin directory*/
678
832
while(true){
679
dirst = readdir(dir);
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
680
836
681
837
/* All directory entries have been processed */
682
838
if(dirst == NULL){
683
if (errno == EBADF){
684
perror("readdir");
685
exitstatus = EXIT_FAILURE;
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
686
842
goto fallback;
687
843
}
688
844
break;
698
854
699
855
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
700
856
".dpkg-old",
857
".dpkg-bak",
701
858
".dpkg-divert", NULL };
702
859
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
703
860
size_t pre_len = strlen(*pre);
717
874
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
718
875
size_t suf_len = strlen(*suf);
719
876
if((d_name_len >= suf_len)
720
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
721
878
== 0)){
722
879
if(debug){
723
880
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
732
889
continue;
733
890
}
734
891
}
735
892
736
893
char *filename;
737
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
894
if(plugindir == NULL){
895
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
896
dirst->d_name));
897
} else {
898
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
899
plugindir,
900
dirst->d_name));
901
}
738
902
if(ret < 0){
739
perror("asprintf");
903
error(0, errno, "asprintf");
740
904
continue;
741
905
}
742
906
743
ret = stat(filename, &st);
744
if (ret == -1){
745
perror("stat");
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
if(ret == -1){
909
error(0, errno, "stat");
746
910
free(filename);
747
911
continue;
748
912
}
749
913
750
914
/* Ignore non-executable files */
751
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
915
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
752
917
if(debug){
753
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
754
919
" with bad type or mode\n", filename);
759
924
760
925
plugin *p = getplugin(dirst->d_name);
761
926
if(p == NULL){
762
perror("getplugin");
927
error(0, errno, "getplugin");
763
928
free(filename);
764
929
continue;
765
930
}
777
942
if(g != NULL){
778
943
for(char **a = g->argv + 1; *a != NULL; a++){
779
944
if(not add_argument(p, *a)){
780
perror("add_argument");
945
error(0, errno, "add_argument");
781
946
}
782
947
}
783
948
/* Add global environment variables */
784
949
for(char **e = g->environ; *e != NULL; e++){
785
950
if(not add_environment(p, *e, false)){
786
perror("add_environment");
951
error(0, errno, "add_environment");
787
952
}
788
953
}
789
954
}
794
959
if(p->environ[0] != NULL){
795
960
for(char **e = environ; *e != NULL; e++){
796
961
if(not add_environment(p, *e, false)){
797
perror("add_environment");
962
error(0, errno, "add_environment");
798
963
}
799
964
}
800
965
}
801
966
802
967
int pipefd[2];
803
ret = pipe(pipefd);
804
if (ret == -1){
805
perror("pipe");
806
exitstatus = EXIT_FAILURE;
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
807
972
goto fallback;
808
973
}
809
974
/* Ask OS to automatic close the pipe on exec */
810
975
ret = set_cloexec_flag(pipefd[0]);
811
976
if(ret < 0){
812
perror("set_cloexec_flag");
813
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
814
979
goto fallback;
815
980
}
816
981
ret = set_cloexec_flag(pipefd[1]);
817
982
if(ret < 0){
818
perror("set_cloexec_flag");
819
exitstatus = EXIT_FAILURE;
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
820
985
goto fallback;
821
986
}
822
987
/* Block SIGCHLD until process is safely in process list */
823
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
990
NULL));
824
991
if(ret < 0){
825
perror("sigprocmask");
826
exitstatus = EXIT_FAILURE;
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
827
994
goto fallback;
828
995
}
829
996
/* Starting a new process to be watched */
830
pid_t pid = fork();
997
pid_t pid;
998
do {
999
pid = fork();
1000
} while(pid == -1 and errno == EINTR);
831
1001
if(pid == -1){
832
perror("fork");
833
exitstatus = EXIT_FAILURE;
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
834
1004
goto fallback;
835
1005
}
836
1006
if(pid == 0){
837
1007
/* this is the child process */
838
1008
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
839
1009
if(ret < 0){
840
perror("sigaction");
841
_exit(EXIT_FAILURE);
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
842
1012
}
843
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
844
1014
if(ret < 0){
845
perror("sigprocmask");
846
_exit(EXIT_FAILURE);
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
847
1017
}
848
1018
849
1019
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
850
1020
if(ret == -1){
851
perror("dup2");
852
_exit(EXIT_FAILURE);
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
853
1023
}
854
1024
855
1025
if(dirfd(dir) < 0){
859
1029
}
860
1030
if(p->environ[0] == NULL){
861
1031
if(execv(filename, p->argv) < 0){
862
perror("execv");
863
_exit(EXIT_FAILURE);
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
864
1034
}
865
1035
} else {
866
1036
if(execve(filename, p->argv, p->environ) < 0){
867
perror("execve");
868
_exit(EXIT_FAILURE);
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
869
1039
}
870
1040
}
871
1041
/* no return */
872
1042
}
873
1043
/* Parent process */
874
close(pipefd[1]); /* Close unused write end of pipe */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
875
1046
free(filename);
876
1047
plugin *new_plugin = getplugin(dirst->d_name);
877
if (new_plugin == NULL){
878
perror("getplugin");
879
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1048
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
NULL)));
880
1053
if(ret < 0){
881
perror("sigprocmask");
1054
error(0, errno, "sigprocmask");
882
1055
}
883
exitstatus = EXIT_FAILURE;
1056
exitstatus = EX_OSERR;
884
1057
goto fallback;
885
1058
}
886
1059
889
1062
890
1063
/* Unblock SIGCHLD so signal handler can be run if this process
891
1064
has already completed */
892
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
893
1068
if(ret < 0){
894
perror("sigprocmask");
895
exitstatus = EXIT_FAILURE;
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
896
1071
goto fallback;
897
1072
}
898
1073
899
FD_SET(new_plugin->fd, &rfds_all);
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1078
#endif
1079
#endif
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1082
before 2.16 */
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1086
#endif
1087
#endif
900
1088
901
if (maxfd < new_plugin->fd){
1089
if(maxfd < new_plugin->fd){
902
1090
maxfd = new_plugin->fd;
903
1091
}
904
905
1092
}
906
1093
907
closedir(dir);
1094
TEMP_FAILURE_RETRY(closedir(dir));
908
1095
dir = NULL;
909
1096
free_plugin(getplugin(NULL));
1097
910
1098
for(plugin *p = plugin_list; p != NULL; p = p->next){
911
1099
if(p->pid != 0){
912
1100
break;
917
1105
free_plugin_list();
918
1106
}
919
1107
}
920
1108
921
1109
/* Main loop while running plugins exist */
922
1110
while(plugin_list){
923
1111
fd_set rfds = rfds_all;
924
1112
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
925
if (select_ret == -1){
926
perror("select");
927
exitstatus = EXIT_FAILURE;
1113
if(select_ret == -1 and errno != EINTR){
1114
error(0, errno, "select");
1115
exitstatus = EX_OSERR;
928
1116
goto fallback;
929
1117
}
930
1118
/* OK, now either a process completed, or something can be read
931
1119
from one of them */
932
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1120
for(plugin *proc = plugin_list; proc != NULL;){
933
1121
/* Is this process completely done? */
934
if(proc->eof and proc->completed){
1122
if(proc->completed and proc->eof){
935
1123
/* Only accept the plugin output if it exited cleanly */
936
1124
if(not WIFEXITED(proc->status)
937
1125
or WEXITSTATUS(proc->status) != 0){
938
1126
/* Bad exit by plugin */
939
1127
940
1128
if(debug){
941
1129
if(WIFEXITED(proc->status)){
942
fprintf(stderr, "Plugin %u exited with status %d\n",
943
(unsigned int) (proc->pid),
1130
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1131
" status %d\n", proc->name,
1132
(intmax_t) (proc->pid),
944
1133
WEXITSTATUS(proc->status));
945
} else if(WIFSIGNALED(proc->status)) {
946
fprintf(stderr, "Plugin %u killed by signal %d\n",
947
(unsigned int) (proc->pid),
948
WTERMSIG(proc->status));
1134
} else if(WIFSIGNALED(proc->status)){
1135
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1136
" signal %d: %s\n", proc->name,
1137
(intmax_t) (proc->pid),
1138
WTERMSIG(proc->status),
1139
strsignal(WTERMSIG(proc->status)));
949
1140
} else if(WCOREDUMP(proc->status)){
950
fprintf(stderr, "Plugin %d dumped core\n",
951
(unsigned int) (proc->pid));
1141
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1142
" core\n", proc->name, (intmax_t) (proc->pid));
952
1143
}
953
1144
}
954
1145
955
1146
/* Remove the plugin */
956
FD_CLR(proc->fd, &rfds_all);
957
1147
#if defined (__GNUC__) and defined (__GLIBC__)
1148
#if not __GLIBC_PREREQ(2, 16)
1149
#pragma GCC diagnostic push
1150
#pragma GCC diagnostic ignored "-Wsign-conversion"
1151
#endif
1152
#endif
1153
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1154
-Wconversion in GNU libc
1155
before 2.16 */
1156
#if defined (__GNUC__) and defined (__GLIBC__)
1157
#if not __GLIBC_PREREQ(2, 16)
1158
#pragma GCC diagnostic pop
1159
#endif
1160
#endif
1161
958
1162
/* Block signal while modifying process_list */
959
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1163
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1164
(SIG_BLOCK,
1165
&sigchld_action.sa_mask,
1166
NULL));
960
1167
if(ret < 0){
961
perror("sigprocmask");
962
exitstatus = EXIT_FAILURE;
1168
error(0, errno, "sigprocmask");
1169
exitstatus = EX_OSERR;
963
1170
goto fallback;
964
1171
}
1172
1173
plugin *next_plugin = proc->next;
965
1174
free_plugin(proc);
1175
proc = next_plugin;
1176
966
1177
/* We are done modifying process list, so unblock signal */
967
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
968
NULL);
1178
ret = (int)(TEMP_FAILURE_RETRY
1179
(sigprocmask(SIG_UNBLOCK,
1180
&sigchld_action.sa_mask, NULL)));
969
1181
if(ret < 0){
970
perror("sigprocmask");
971
exitstatus = EXIT_FAILURE;
1182
error(0, errno, "sigprocmask");
1183
exitstatus = EX_OSERR;
972
1184
goto fallback;
973
1185
}
974
1186
975
1187
if(plugin_list == NULL){
976
1188
break;
977
1189
}
1190
978
1191
continue;
979
1192
}
980
1193
981
1194
/* This process exited nicely, so print its buffer */
982
1195
983
1196
bool bret = print_out_password(proc->buffer,
984
1197
proc->buffer_length);
985
1198
if(not bret){
986
perror("print_out_password");
987
exitstatus = EXIT_FAILURE;
1199
error(0, errno, "print_out_password");
1200
exitstatus = EX_IOERR;
988
1201
}
989
1202
goto fallback;
990
1203
}
991
1204
992
1205
/* This process has not completed. Does it have any output? */
993
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1206
#if defined (__GNUC__) and defined (__GLIBC__)
1207
#if not __GLIBC_PREREQ(2, 16)
1208
#pragma GCC diagnostic push
1209
#pragma GCC diagnostic ignored "-Wsign-conversion"
1210
#endif
1211
#endif
1212
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1213
warning from
1214
-Wconversion
1215
in GNU libc
1216
before
1217
2.16 */
1218
#if defined (__GNUC__) and defined (__GLIBC__)
1219
#if not __GLIBC_PREREQ(2, 16)
1220
#pragma GCC diagnostic pop
1221
#endif
1222
#endif
994
1223
/* This process had nothing to say at this time */
1224
proc = proc->next;
995
1225
continue;
996
1226
}
997
1227
/* Before reading, make the process' data buffer large enough */
998
1228
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
999
1229
proc->buffer = realloc(proc->buffer, proc->buffer_size
1000
1230
+ (size_t) BUFFER_SIZE);
1001
if (proc->buffer == NULL){
1002
perror("malloc");
1003
exitstatus = EXIT_FAILURE;
1231
if(proc->buffer == NULL){
1232
error(0, errno, "malloc");
1233
exitstatus = EX_OSERR;
1004
1234
goto fallback;
1005
1235
}
1006
1236
proc->buffer_size += BUFFER_SIZE;
1007
1237
}
1008
1238
/* Read from the process */
1009
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1010
BUFFER_SIZE);
1011
if(ret < 0){
1239
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1240
proc->buffer
1241
+ proc->buffer_length,
1242
BUFFER_SIZE));
1243
if(sret < 0){
1012
1244
/* Read error from this process; ignore the error */
1245
proc = proc->next;
1013
1246
continue;
1014
1247
}
1015
if(ret == 0){
1248
if(sret == 0){
1016
1249
/* got EOF */
1017
1250
proc->eof = true;
1018
1251
} else {
1019
proc->buffer_length += (size_t) ret;
1252
proc->buffer_length += (size_t) sret;
1020
1253
}
1021
1254
}
1022
1255
}
1023
1024
1256
1257
1025
1258
fallback:
1026
1259
1027
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1260
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1261
and exitstatus != EX_OK)){
1028
1262
/* Fallback if all plugins failed, none are found or an error
1029
1263
occured */
1030
1264
bool bret;
1031
1265
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1032
1266
char *passwordbuffer = getpass("Password: ");
1033
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1267
size_t len = strlen(passwordbuffer);
1268
/* Strip trailing newline */
1269
if(len > 0 and passwordbuffer[len-1] == '\n'){
1270
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1271
len--;
1272
}
1273
bret = print_out_password(passwordbuffer, len);
1034
1274
if(not bret){
1035
perror("print_out_password");
1036
exitstatus = EXIT_FAILURE;
1275
error(0, errno, "print_out_password");
1276
exitstatus = EX_IOERR;
1037
1277
}
1038
1278
}
1039
1279
1040
1280
/* Restore old signal handler */
1041
1281
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1042
1282
if(ret == -1){
1043
perror("sigaction");
1044
exitstatus = EXIT_FAILURE;
1283
error(0, errno, "sigaction");
1284
exitstatus = EX_OSERR;
1045
1285
}
1046
1286
1047
1287
if(custom_argv != NULL){
1048
1288
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1049
1289
free(*arg);
1055
1295
closedir(dir);
1056
1296
}
1057
1297
1058
/* Free the process list and kill the processes */
1298
/* Kill the processes */
1059
1299
for(plugin *p = plugin_list; p != NULL; p = p->next){
1060
1300
if(p->pid != 0){
1061
1301
close(p->fd);
1062
1302
ret = kill(p->pid, SIGTERM);
1063
1303
if(ret == -1 and errno != ESRCH){
1064
1304
/* Set-uid proccesses might not get closed */
1065
perror("kill");
1305
error(0, errno, "kill");
1066
1306
}
1067
1307
}
1068
1308
}
1069
1309
1070
1310
/* Wait for any remaining child processes to terminate */
1071
do{
1311
do {
1072
1312
ret = wait(NULL);
1073
1313
} while(ret >= 0);
1074
1314
if(errno != ECHILD){
1075
perror("wait");
1315
error(0, errno, "wait");
1076
1316
}
1077
1317
1078
1318
free_plugin_list();
1079
1319
1080
1320
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0